Instrument set for electrical distribution systems.



V. G. APPLE. INSTRUMENT SET FOR ELECTRICAL DISTRIBUTION SYSTEMS.

APPLICATION FILED MAY 11, 1907.

1,021,293, 4 Patented Mar.26,1912.

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v. G. APPLE. INSTRUMENT SET FOR ELECTRICAL DISTRIBUTION SYSTEMS.

APPLIOATION FILED MAY 11, 1907.

Patented Mar. 26, 1912.

2 SHEETS-SHEET 2.

L Y L L WORK/Nb Mdnasa JFZUGZZZO/fi Wm dwefliavgo/vle- UNITED A ESPATENT OFFICE. Y

VINCENT 6 APPLE, OF DAYTON, OHIO, ASSIGNOR 'IO DAYTON.ELEG'IRICALFACTURING 00., A CORPORATION OF OHIO".

MANU- INSTR UMENT SET FOR ELECTRICAL DISTRIBUTION SYSTEMS.

. Specification of Letters Patent.

' Application filed May 11, 1907. Serial No. 373,056.

' To all whom it may concern nected with an external working circuit,

the dynamo, and battery, the, system so equipped is provided with meansfor meas uring the voltage of the battery, operable at pleasure througha i switch connection,

and means for controlling the connections of the dynamo and battery,such that connection willbe established between the dynamo and thebattery only when the potential of the dynamo is higher than that of thebattery. r

In the drawings, wherein I have indi cated an instrument set embodyingmy ,invention and suitable exterior electrical connections therefor,Figure 1 is a front eleva-' tion of the set. Fig. 2 is a centralvertical section therethrough, and Fig. 3 is a rear elevation of the setwith the casing removed; Fig. 4 indicates diagrammatically theelectrical connections of, the instrument setandexterior wiring devices,and Fig. 5 is a simplified diagram of like connections. 1 Throughout thedrawings like numerals of reference refer always to like parts.

In the drawings 10- indicates a frame, preferably consisting ofinterfitting insulate ing members, arranged to forma hollow casing, 11being a hollow base member and 12 an interfitting; cover member. Uponthe top member of the casing are provided suitable terminal members 13,145, 15 and 16, which may conveniently be metallic sleeves arranged toreceive screws, extending to the rear exterior of the casin forconnection with the external circuit wiring. The cover member 12 of thecasing carries a suitable volt-meter 17, a hand switch 18, and anautomatic cut out 19. The volt-meter dial is exposed as shown.The'switch 18 is preferably a push buttonexposed for operation from theexterior of the cover and controlling the circuit of the volt-meter, sothat by the operation of the switch the volt-meter may be cut into,connection with the ter- Patented Mal-.26, 1912.

minals of anexterior battery'circuit. The

cut-out 19 is concealed within the casing and provided with electricalconnections such that, when associated with the exterior circuit.wiring, it automatically controls communication between the battery andthe dynamo.

In the specificconstruotion shown 13 is' the terminal for the negativeside of the;

storage battery S B, the terminal 14 is connected with the negative sideof a working circuit. contact 15 is connected to the plus side of theworking circuit, to which isalso connected the ositive terminals of thedynamt) D and t e storage battery S B,"and the terminal 16 is connectedto the negative terminal of the dynamo. vInternally the volt mgeter 17is connected as by wire 20 to the terminal 15', connected with thepositive a terminal of the storage battery; The opposite terminal of thevolt-meter 17 is connected by wire 21 to one terminal of .thepush-button switch 18, the other terminal being connected by acontinuation of wire a 21 with the terminal 13 of the.- set forconnection with the negative terminal of the storage battery. v

The automatic cut-out for the storage battery,indicated generally at 19,comprises an electro-magnet 22' provided with an armature 23 having afront contact 24, the magnet being provided with two windings, one ahigh resistance winding 26, connected between post-s 15 and 16, and alow resistance coil 27, connected between posts 16 and the contact 24 ofthe cut-out, the armature 23 thereof being connected by wire 28 to theterminal 14, which said terminal directly connected as by wire 29 withthe terminal 13. Now it will be seen that under normal conditions thedynamo D has a constant circuit through the high res1stance coil 26fromthe terminal 15 of the set confrom the dynamo to the positive poleof the .meteracross the battery terminals.

st0rage battery connection, and from the terminal 13 of the set,connected to the negative side of the battery through wires 29 and 28,the armature 23 and its contacts 24:, the low resistance coils 27 to theterminal 16 connected with the negative terminal of the dynamo. Shouldat any time the electro-motive force of the dynamo drop below that ofthe battery, however, the reversal of current flow through the circuitlast described, causes the effective denergization of magnet 22, so thatthe armature 2-3 drops back opening the circuit of the low resistancewinding and effecting disconnection of the dynamo and battery. At alltimes, it will be seen, that the battery is bridged across the workingcircuit, and at any time its voltage may be read by closing the handswitch 18, which bridges the volt- It Will be observed that this abilityto read at any time the battery voltage is of great advantage,particularly in electrical work, where usually the dynamo is driventhrough an adjustable governor, whereby its speed may be regulated, inrelation to the speed of the prime mover, such as the fly-wheel of thegas engine with which the ignition system is connected. Under suchcircumstances the slowing down of an engine and consequent slowing downof the dynamo may result in the reduction of the dynamo voltage to apoint below the voltage of the battery, so that although by theoperation of the automatic cut-out the reversal of current flow throughthe dynamo is avoided, the battery-alone is called upon to supply theignition current and undergoes onstant depletion, so that observationthrough the agency of the volt-meter and the slight drop in the storagebattery voltage indicates to the observer that the dynamo should bespeeded up, by suit-able adjustment of its governor. In this manner theinstrument set, which I have described, supplies a means. for protectingthe dynamo against discharge from the battery, whenthe dynamo voltagedrops, and also for protectingthe battery against being run downneedlessly, or against being charged at too rapid a rate. I

While I have herein described in some detail an operative embodiment ofmy inveir tion, which I have commercially'successfully employed, it willbe apparent that changes may be made in the specific constructionWithout departure from the-spirit ignition of my invention within thescope of the appended claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent. of the United States, is:

1. An instrument set of the character described, comprising a hollowframe, suitable" terminals exposed upon the rear face of the frame, avoltmeter and a hand switch exposed upon the front face of the frame, acut out relay completely inclosed within the frame, and connections forbringing the voltmeter through the hand switch across certain of saidterminals, and permanently connecting the automatic cut out relay withcertain of said terminals.

2. An instrument setof the character described, comprising a frame,including separable base and cover parts inclosing a chamber, suitableterminal connections from the interior to the exterior of the frame, avoltmeter and a handswitch exposed upon the face of the cover, anautomatic cut out relay inclosed within the chamber of the frame, andwiring connections concealed within the "chamber, connecting thevoltmeter and hand switch in series with appropri; e terminals, andpermanently connecting the cut out relay with appropriate terminals.

3. An instrument set for inclusion in an ignition system, consisting ofa frame, providing a separable base and cover including a chamber, avolt-meter, an automatic cut-out and a hand-switch carried by saidcover, and suitable circuit connections, the automatic cut-out andwiring connections being concealed Within the chamber by the cover, saidconnections comprising a terminal for connection in common with adynamo, a storage battery and a working circuit, and individualconnections for the remaining terminals of said dynamo, storage batteryand working circuit, and

'the electrical connections comprising Wiring for bridging thevolt=meter through the hand switch across the battery terminals, and forconnecting the automatic cutout to control the connection of theindividual battery terminal with the indi vidual dynamo terminal.

4. An instrument set forinclusion in an ignition systemcomprising aframe providing a separable base and .cover of insulating materialinclosing a chamber, said frame carrying exposed upon the face of itscover a voltmeter-and a hand-switch, and carrying on-the cover withinthe chamber, an automatic cut 011t,';f0l11. binding posts on the outsideof the frame for mechanically connecting the frame to a support and forelectrically connecting one*in common to a dynamo, storage battery, andworking circuit, and the others individually to the said electricalinstrumentali ties, and coiinectors concealed withinthe In testimonywhereof I hereunto' set my frame for bridging the voltmeter through.hand in the presence-0f two Witnesses. the hand-switch across thebattery terminal and for connecting the'automatic cut' 7' I VINCENTAPPLE 5 out to control the connection of the individ- In the presence ofual battery terminal With the individual E. M. GRIER, dynamo-terminal. IN. E. SNYDER.

Copies oi. this paltent may be obtained tor five cents each, byaddressing the "Commissioner or ratents,

Washington, D. G. I

